All-Optical Generation of Antiferromagnetic Magnon Currents via the Magnon Circular Photogalvanic Effect

(submitted), (2021)

All-Optical Generation of Antiferromagnetic Magnon Currents via the Magnon Circular Photogalvanic Effect

Emil Viñas Boström, Tahereh Sadat Parvini,, James W. McIver, Angel Rubio, Silvia Viola Kusminskiy, Michael A. Sentef

We introduce the magnon circular photogalvanic effect enabled by stimulated Raman scattering. This provides an all-optical pathway to the generation of directed magnon currents with circularly polarized light in honeycomb antiferromagnetic insulators. The effect is the leading order contribution to magnon photocurrent generation via optical fields. Control of the magnon current by the polarization and angle of incidence of the laser is demonstrated. Experimental detection by sizeable inverse spin Hall voltages in platinum contacts is proposed.

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arxiv
http://arxiv.org/abs/2104.10914
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This work was supported by the European Research Council (ERC-2015-AdG694097), the Cluster of Excellence ’Advanced Imaging of Matter’ (AIM), Grupos Consolidados (IT1249-19) and SFB925 ”Light induced dynamics and control of correlated quantum systems”. The Flatiron Institute is a division of the Simons Foundation. MAS acknowledges financial support through the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via the Emmy Noether program (SE 2558/2). AR, JWM and MAS acknowledge support from the Max Planck-New York City Center for NonEquilibrium Quantum Phenomena. TSP and SVK acknowledge financial support from the Max Planck Society through a Max Planck Research Group. JWM acknowledges support from the Cluster of Excellence ‘CUI: Advanced Imaging of Matter’ of the Deutsche Forschungsgemeinschaft (DFG), EXC 2056, project ID 390715994 and is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – SFB925 – project 170620586

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